Thorfun

Thanks for the explanation. I’ll give it a trial when I can and take a photo to ask if I’ve done it how I understand it

I have plenty of the stuff! bought 20m of it previously so could easily use it instead of clips. but, don't clips hold pipe vertical as well as stopping it falling away from the wall, so how does the strap band do this?

then I pressure tested the whole system (already did each run individually and was all ok so wasn't expecting any issues) and it passed with flying colours. before: after 5 mins: testing at the manhole outside with all ok I fitted the AAVs on 2 of the stacks anyone notice any issues?

so I finished the internal 110mm soil pipes (mostly anyway, still go the en-suite above the garage to do). here's the 3rd run. starting in an en-suite down to the downstairs WC in to the basement where the rest bend takes it on the horizontal and I have a rodding point across a hallway to join up with the other 2 runs and out the basement wall all look ok?

what size insulation did you use? 9mm/13mm/25mm/something else? and did you use Climaflex as well?

is that so you don't have to cut the insulation around the clips? you can insulate the pipe and then strap band it to the wall?

Loxone will have that covered for me. 😊

Was going to use these clips. https://www.screwfix.com/p/talon-15mm-hinge-clip-white-100-pack/19684 so will pick some up and measure

if I did decide to insulate the colds then what size wall thickness of Armaflex would I be looking at? would it just be the 9mm to give basic insulation? or would a thicker wall be required?

I'm kind of thinking of taking the 'better safe than sorry' approach to my DIY plumbing!

that's interesting. I thought it was more likely to insulate the hots and not the colds! how would you know if there's going to be a chance of condensation though? is that experience or some mathematical calculation? I was planning on running 10mm HRC (that'll be a subject of another post after I've done the research) to the wash basins and sinks. I've read previous posts from you that say to run the hot and HRC in the same piece of insulation so that was what I was thinking of doing. so, I guess if I'm doing that for those then it's a small step to just insulating the whole damn lot?

another question.....pipe lagging with hep2o. is it really worth it in a well insulated airtight property? I'm aware that the first 1m or so from the UVC needs to be lagged and will be and my pipes from the ASHP to UVC will be lagged for their entire run but taps/sinks/showers/baths? ps. I know this subject has been done to death on here but, from my reading, there's still some fore and some against! what's a beginner to do if the experienced ones can't decide?

good luck. I look forward to following your progress

I'm sure that'll depend on what is deposited in it though.

for a man of your calibre, I'm sure it is. 😉

I'll probably need one of these if I ever install the loo in the basement. I'm very happy to let you be the guinea pig on this one!

does the pool not need some form of pump out? even if it does I guess it couldn't go into a foul water sump as that will just fill up your STP! when I started with the idea of a basement and got it approved and built I never thought it would complicate things so much. I really hope it's worth it! 😂

yeah, makes sense. and I guess that once I've run out of the excess 20mm electrical conduit I can get some 21.5mm overflow pipe. 🙂

qq on this subject. I have a lot of 20mm electrical conduit lying around. can I use that for 15mm pipe? according to this question on the SF page for it so that will give an 18.2mm ID. a bit tight for 15mm hep2o pipe or should it fit like a glove?

our civil engineer specified one of these for our foul water to all flow out of the basement and in to the sump and then pumped to the STP. when I looked in to costs for a 4m - 5m deep one at £5k I decided to ask them to design the foul water to use gravity and if we ever fit a toilet in the basement we'd use a saniflo! obviously a little different for you with a pool as I'm sure you'll have more need for foul/waste water to be dealt with in your basement.

I bring out the best in people.

My brother had a stroke at 46. Doctors said he was lucky to survive the night. But 6 years on and he’s driving but his right arm is still poor and the hand mostly stays in a fist. He also has Aphasia to top things off. But he says this is his second life and is pretty upbeat most of the time and is enjoying life in sunny Scotland. I wish you a speedy recovery and a long, happy and healthy second life! 🤘

ps. I have considered a hybrid version of two pipes to each room from a manifold and teeing off to each appliance from there. but, as you say, adds more in fittings even though it reduces pipe usage. but also adds joins which I'd like to get away from!

hopefully the house will be 'mostly' finished before we move in so won't really have a need day 1 to isolate, but the studio en-suite most likely won't be finished so will need to isolate that. I do love the idea of radial plumbing and the single point of isolation sounds great. just looking at those plans and looking at all those pipe runs it brought it all home as to actually how many pipes that is! which is why I was thinking for the his/hers sinks we could isolate the pair from the manifold to save running an extra 2 x pipes. but, I think I'll probably just run them anyway.

I presume you have planning permission? do you have building regs drawings? BCO will need (or at least did in my case) to see the SE calculations for the building. I suggest you spend the next 2 weeks trawling this forum on every possible subject and talk to the existing NI members who have done it all. if you can't get a mortgage on ICF then, rather than fighting the system, maybe pick a different build method? I can empathise with your need to get this going but maybe just take a step back and get some solid plans in place before digging more stuff up!